over a total volume of

I'm not very sure about the syntasis of my translation and I need help to rebuild my translation into Spanish.

Text: "patients will receive XXX as an i.v. infusion, starting at 2.0 mg/day as a FD (flat dose), over a minimum total volume of 100 ml dilution (in 5% glucose or 0.9% sodium chloride) via a central catheter over one hour (at a fixed rate) and through a pump device."

The English text is not clear. It appears that the patients will be given 2 mg/day of XXX, that the XXX will be diluted by an unstated amount in an aqueous solution of either 5% glucose or 0.9% NaCl, and that the patients will receive unspecified doses of this diluted product until the total of 100 ml is reached. Your question suggests that the English text is itself a translation, and that you want to translate it again into Spanish; if this is correct it would be preferable to have the original text.